The aim of this work was to find the optimum rheology for maximising the strength of basalt-fibre-reinforced self-compacting mortar (BFRSCM). An experiment was employed to design mixes based on the basalt fibre volume percentage (F), water/binder ratio (w/b) and superplasticiser (SP) dosage. Using an L9 Taguchi array, nine mixes were designed considering combinations of F (0.5, 1.0 and 1.5%), w/b (0.35, 0.40 and 0.45) and SP dosage (D_SP) (16, 19 and 22 ml/kg). Mini slump flow diameter (SFD) and mini V-funnel time (T_v) were measured to determine the rheological characteristics and compressive strength (CS) and split tensile strength (STS) were conducted to determine the mechanical properties of the BFRSCM mixes. After statistical analyses, optimisation and prediction, rheology–strength relationships and optimum properties were ascertained. For further assessment of microstructures, scanning electron microscopy was conducted on three different mixes. It was found that the optimum combinations of (F, w/b, D_SP) for CS and STS were (1.0%, 0.35, 19 ml/kg) and (1.5%, 0.40, 16 ml/kg), respectively. The optimum fibre percentage for CS was F = 1.0%, while for STS it was F = 1.5%. The optimum rheology for maximum CS occurred with SFD = 27.5 cm and T_v = 7.9 s, while that for maximum STS was with SFD = 29 cm and T_v = 5.0 s. The mean absolute percentage errors of the predictions for all properties were lower than 5% except for T_v, which was 13%.

中文翻译：

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玄武岩纤维增强自密实砂浆流变强度关系分析与优化

这项工作的目的是找到最佳流变学，以最大限度地提高玄武岩纤维增强自密实砂浆 (BFRSCM) 的强度。根据玄武岩纤维体积百分比 ( F )、水/粘合剂比 (w/b) 和高效减水剂 (SP) 剂量，采用实验设计混合物。使用 L9 Taguchi 阵列，考虑F（0.5、1.0 和 1.5%）、w/b（0.35、0.40 和 0.45）和 SP 剂量 ( D _SP )（16、19 和 22 ml/kg）的组合，设计了九种混合物. 最小坍落度流动直径 (SFD) 和最小 V 型漏斗时间 ( T _v) 进行测量以确定流变特性，并进行压缩强度 (CS) 和劈裂拉伸强度 (STS) 以确定 BFRSCM 混合物的机械性能。经过统计分析、优化和预测后，确定了流变学-强度关系和最佳性能。为了进一步评估微观结构，对三种不同的混合物进行了扫描电子显微镜检查。结果发现，CS 和 STS 的最佳组合 ( F , w/b, D _{SP ) 分别为 (1.0%, 0.35, 19 ml/kg) 和 (1.5%, 0.40, 16 ml/kg)。}CS 的最佳纤维百分比为F  = 1.0%，而 STS 为F = 1.5%。最大 CS 的最佳流变发生在 SFD = 27.5 cm 和T _v  = 7.9 s 时，而最大 STS 的最佳流变发生在 SFD = 29 cm 和T _v  = 5.0 s 时。除了T _v为 13%之外，所有属性预测的平均绝对百分比误差均低于 5 %。